Re: drawRect not always called after setNeedsDisplay
Re: drawRect not always called after setNeedsDisplay
- Subject: Re: drawRect not always called after setNeedsDisplay
- From: Ian was here <email@hidden>
- Date: Wed, 20 Jul 2005 21:38:49 -0700 (PDT)
You could test this by calling display: in viewB
rather than setNeedsDisplay:YES. This should call
viewB's drawRect method sooner. Then put a breakpoint
or tracer within viewB's drawRect: method.
If nothing else, this may help in revealing the
problem.
--- purple nekko <email@hidden> wrote:
> Overview
> ---------
> I have an NSView (viewA) that manages multiple
> subviews. This view's
> drawRect contains code that positions and sizes all
> of its subviews
> accordingly and calls each of the subview's
> setNeedsDisplay:YES
> method. One of the subviews is also an NSView
> (viewB), and it also
> has multiple subviews.
>
> Problem
> -------
> If the window that contains viewA is resized,
> viewA's drawRect method
> is invoked, but for some unknown reason, viewB's
> drawRect method is
> not always invoked, despite the fact that viewA's
> drawRect method
> invokes viewB's setNeedsDisplay:YES method. The
> drawRect method
> associated with all of viewA's other subviews are
> invoked though.
>
> Question
> --------
> Can anyone suggest any reasons as to why viewB's
> drawRect method is
> not always called after its superview sends it a
> setNeedsDisplay
> message? Any ideas on what I'm doing wrong would be
> appreciated.
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